121507371778508 has 48 divisors (see below), whose sum is σ = 214721431848000. Its totient is φ = 60159419916288.

The previous prime is 121507371778489. The next prime is 121507371778511. The reversal of 121507371778508 is 805877173705121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3987886298 + ... + 3987916766.

It is an arithmetic number, because the mean of its divisors is an integer number (4473363163500).

Almost surely, 2^{121507371778508} is an apocalyptic number.

It is an amenable number.

121507371778508 is a deficient number, since it is larger than the sum of its proper divisors (93214060069492).

121507371778508 is a wasteful number, since it uses less digits than its factorization.

121507371778508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38594 (or 38592 counting only the distinct ones).

The product of its (nonzero) digits is 23049600, while the sum is 62.

The spelling of 121507371778508 in words is "one hundred twenty-one trillion, five hundred seven billion, three hundred seventy-one million, seven hundred seventy-eight thousand, five hundred eight".